feat: add watchlist panel for pinned counterparties and assets

[ifygreg01-best]

Summary

Closes #891

Adds a Watchlist Panel to the dashboard that lets users pin counterparty addresses or assets for quick reference without filtering the full transaction list.

Changes

File	Change
types/watchlist.ts	New — WatchlistItem TypeScript type
context/wallet-context.tsx	New — WatchlistProvider, useWatchlist hook, per-account localStorage persistence
components/dashboard/watchlist-panel.tsx	New — full panel UI (empty state, loading skeleton, add form, item cards, search/filter)
components/dashboard/watchlist-panel.test.tsx	New — 59 Vitest unit tests
tests/watchlist.spec.ts	New — 18 Playwright E2E tests + 3 axe-core a11y scans
app/layout.tsx	WatchlistProvider wrapped inside WalletProvider
components/dashboard/dashboard-page.tsx	<WatchlistPanel /> rendered on the dashboard
design/dashboard-redesign.md	Full feature spec

Features

• Pin / unpin — address or asset, with an optional label (≤ 40 chars)
• Per-account persistence — localStorage key stellopay.watchlist.<address>; empty list shown when disconnected
• Item cards — show balance, last-amount (±), last-activity timestamp, status badge, token badge
• Search / filter — by address fragment, label, or token symbol; clear button restores the full list
• Duplicate guard — case-insensitive; silently ignored
• Responsive — single column < 768 px, two columns ≥ 768 px

Accessibility (WCAG 2.1 AA)

• <section aria-labelledby> tied to <h2>
• <ul aria-label="N pinned items">, <article aria-label="Watchlist item: …">
• All controls are native <button> / <input> — no custom tabindex
• aria-expanded, aria-required, aria-invalid, aria-describedby on form inputs
• role="alert" on validation errors
• role="status" aria-busy aria-live on loading skeleton
• focus-visible:ring-2 focus-visible:ring-blue-500 on every interactive element

Testing

• 59 unit tests (all passing): render, empty state, add-item form, remove/unpin, search/filter, item card display, localStorage persistence, useWatchlist guard, accessibility spot-checks
• 18 E2E tests: panel visibility, pin (with/without label, validation, cancel), unpin, persistence across reload, per-account scoping, disconnect/reconnect, search/filter, and 3 axe-core scans (empty / with items / form open)

npm test -- watchlist-panel   # 59/59 unit tests pass
npx playwright test tests/watchlist.spec.ts

[vercel]

@ifygreg01-best is attempting to deploy a commit to the Jagadeesh B's projects Team on Vercel.

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[ifygreg01-best]

Hi maintainer I have completed the implementation for this issue.could you please approve the workflow so the vercel checks can run? Thank you